//! If you define a new `LateLintPass`, you will also need to add it to the
//! `late_lint_methods!` invocation in `lib.rs`.
-use crate::{EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext};
+use crate::{
+ types::CItemKind, EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext,
+};
use rustc_ast::ast::{self, Expr};
use rustc_ast::attr::{self, HasAttrs};
use rustc_ast::tokenstream::{TokenStream, TokenTree};
/// Checks whether two types are structurally the same enough that the declarations shouldn't
/// clash. We need this so we don't emit a lint when two modules both declare an extern struct,
/// with the same members (as the declarations shouldn't clash).
- fn structurally_same_type<'tcx>(cx: &LateContext<'tcx>, a: Ty<'tcx>, b: Ty<'tcx>) -> bool {
+ fn structurally_same_type<'tcx>(
+ cx: &LateContext<'tcx>,
+ a: Ty<'tcx>,
+ b: Ty<'tcx>,
+ ckind: CItemKind,
+ ) -> bool {
+ debug!("structurally_same_type(cx, a = {:?}, b = {:?})", a, b);
let tcx = cx.tcx;
if a == b || rustc_middle::ty::TyS::same_type(a, b) {
// All nominally-same types are structurally same, too.
let b_kind = &b.kind;
use rustc_target::abi::LayoutOf;
- let compare_layouts = |a, b| {
- let a_layout = &cx.layout_of(a).unwrap().layout.abi;
- let b_layout = &cx.layout_of(b).unwrap().layout.abi;
- let result = a_layout == b_layout;
- result
+ let compare_layouts = |a, b| -> bool {
+ &cx.layout_of(a).unwrap().layout.abi == &cx.layout_of(b).unwrap().layout.abi
};
+ #[allow(rustc::usage_of_ty_tykind)]
+ let is_primitive_or_pointer =
+ |kind: &ty::TyKind<'_>| kind.is_primitive() || matches!(kind, RawPtr(..));
+
match (a_kind, b_kind) {
(Adt(..), Adt(..)) => compare_layouts(a, b),
(Array(a_ty, a_const), Array(b_ty, b_const)) => {
// For arrays, we also check the constness of the type.
a_const.val == b_const.val
- && Self::structurally_same_type(cx, a_const.ty, b_const.ty)
- && Self::structurally_same_type(cx, a_ty, b_ty)
+ && Self::structurally_same_type(cx, a_const.ty, b_const.ty, ckind)
+ && Self::structurally_same_type(cx, a_ty, b_ty, ckind)
}
- (Slice(a_ty), Slice(b_ty)) => Self::structurally_same_type(cx, a_ty, b_ty),
+ (Slice(a_ty), Slice(b_ty)) => Self::structurally_same_type(cx, a_ty, b_ty, ckind),
(RawPtr(a_tymut), RawPtr(b_tymut)) => {
a_tymut.mutbl == a_tymut.mutbl
- && Self::structurally_same_type(cx, &a_tymut.ty, &b_tymut.ty)
+ && Self::structurally_same_type(cx, &a_tymut.ty, &b_tymut.ty, ckind)
}
(Ref(_a_region, a_ty, a_mut), Ref(_b_region, b_ty, b_mut)) => {
// For structural sameness, we don't need the region to be same.
- a_mut == b_mut && Self::structurally_same_type(cx, a_ty, b_ty)
+ a_mut == b_mut && Self::structurally_same_type(cx, a_ty, b_ty, ckind)
}
(FnDef(..), FnDef(..)) => {
let a_poly_sig = a.fn_sig(tcx);
(a_sig.abi, a_sig.unsafety, a_sig.c_variadic)
== (b_sig.abi, b_sig.unsafety, b_sig.c_variadic)
&& a_sig.inputs().iter().eq_by(b_sig.inputs().iter(), |a, b| {
- Self::structurally_same_type(cx, a, b)
+ Self::structurally_same_type(cx, a, b, ckind)
})
- && Self::structurally_same_type(cx, a_sig.output(), b_sig.output())
+ && Self::structurally_same_type(cx, a_sig.output(), b_sig.output(), ckind)
}
(Tuple(a_substs), Tuple(b_substs)) => {
a_substs.types().eq_by(b_substs.types(), |a_ty, b_ty| {
- Self::structurally_same_type(cx, a_ty, b_ty)
+ Self::structurally_same_type(cx, a_ty, b_ty, ckind)
})
}
// For these, it's not quite as easy to define structural-sameness quite so easily.
| (GeneratorWitness(..), GeneratorWitness(..))
| (Projection(..), Projection(..))
| (Opaque(..), Opaque(..)) => false,
+
// These definitely should have been caught above.
(Bool, Bool) | (Char, Char) | (Never, Never) | (Str, Str) => unreachable!(),
- // Disjoint kinds.
- (_, _) => {
- // First, check if the conversion is FFI-safe. This can happen if the type is an
- // enum with a non-null field (see improper_ctypes).
- let is_primitive_or_pointer =
- |ty: Ty<'tcx>| ty.is_primitive() || matches!(ty.kind, RawPtr(..));
- if (is_primitive_or_pointer(a) || is_primitive_or_pointer(b))
- && !(is_primitive_or_pointer(a) && is_primitive_or_pointer(b))
- && (matches!(a_kind, Adt(..)) || matches!(b_kind, Adt(..)))
- /* ie, 1 adt and 1 primitive */
- {
- let (primitive_ty, adt_ty) =
- if is_primitive_or_pointer(a) { (a, b) } else { (b, a) };
- // First, check that the Adt is FFI-safe to use.
- use crate::types::{ImproperCTypesMode, ImproperCTypesVisitor};
- let vis =
- ImproperCTypesVisitor { cx, mode: ImproperCTypesMode::Declarations };
-
- if let Adt(def, substs) = adt_ty.kind {
- let repr_nullable = vis.is_repr_nullable_ptr(adt_ty, def, substs);
- if let Some(safe_ty) = repr_nullable {
- let safe_ty_layout = &cx.layout_of(safe_ty).unwrap();
- let primitive_ty_layout = &cx.layout_of(primitive_ty).unwrap();
-
- use rustc_target::abi::Abi::*;
- match (&safe_ty_layout.abi, &primitive_ty_layout.abi) {
- (Scalar(safe), Scalar(primitive)) => {
- // The two types are safe to convert between if `safe` is
- // the non-zero version of `primitive`.
- use std::ops::RangeInclusive;
-
- let safe_range: &RangeInclusive<_> = &safe.valid_range;
- let primitive_range: &RangeInclusive<_> =
- &primitive.valid_range;
-
- return primitive_range.end() == safe_range.end()
- // This check works for both signed and unsigned types due to wraparound.
- && *safe_range.start() == 1
- && *primitive_range.start() == 0;
- }
- _ => {}
- }
- }
- }
+ // An Adt and a primitive type. This can be FFI-safe is the ADT is an enum with a
+ // non-null field.
+ (Adt(..), other_kind) | (other_kind, Adt(..))
+ if is_primitive_or_pointer(other_kind) =>
+ {
+ let (primitive, adt) =
+ if is_primitive_or_pointer(&a.kind) { (a, b) } else { (b, a) };
+ if let Some(ty) = crate::types::repr_nullable_ptr(cx, adt, ckind) {
+ ty == primitive
+ } else {
+ compare_layouts(a, b)
}
- // Otherwise, just compare the layouts. This may be underapproximate, but at
- // the very least, will stop reads into uninitialised memory.
- compare_layouts(a, b)
}
+ // Otherwise, just compare the layouts. This may fail to lint for some
+ // incompatible types, but at the very least, will stop reads into
+ // uninitialised memory.
+ _ => compare_layouts(a, b),
}
}
}
existing_hid, existing_decl_ty, this_fi.hir_id, this_decl_ty
);
// Check that the declarations match.
- if !Self::structurally_same_type(cx, existing_decl_ty, this_decl_ty) {
+ if !Self::structurally_same_type(
+ cx,
+ existing_decl_ty,
+ this_decl_ty,
+ CItemKind::Declaration,
+ ) {
let orig_fi = tcx.hir().expect_foreign_item(existing_hid);
let orig = Self::name_of_extern_decl(tcx, orig_fi);
use rustc_middle::mir::interpret::{sign_extend, truncate};
use rustc_middle::ty::layout::{IntegerExt, SizeSkeleton};
use rustc_middle::ty::subst::SubstsRef;
-use rustc_middle::ty::{self, AdtKind, Ty, TypeFoldable};
+use rustc_middle::ty::{self, AdtKind, Ty, TyCtxt, TypeFoldable};
use rustc_span::source_map;
use rustc_span::symbol::sym;
use rustc_span::{Span, DUMMY_SP};
+use rustc_target::abi::Abi;
use rustc_target::abi::{Integer, LayoutOf, TagEncoding, VariantIdx, Variants};
-use rustc_target::spec::abi::Abi;
+use rustc_target::spec::abi::Abi as SpecAbi;
use log::debug;
use std::cmp;
declare_lint_pass!(ImproperCTypesDefinitions => [IMPROPER_CTYPES_DEFINITIONS]);
-crate enum ImproperCTypesMode {
- Declarations,
- Definitions,
+#[derive(Clone, Copy)]
+crate enum CItemKind {
+ Declaration,
+ Definition,
}
-crate struct ImproperCTypesVisitor<'a, 'tcx> {
- crate cx: &'a LateContext<'tcx>,
- crate mode: ImproperCTypesMode,
+struct ImproperCTypesVisitor<'a, 'tcx> {
+ cx: &'a LateContext<'tcx>,
+ mode: CItemKind,
}
enum FfiResult<'tcx> {
FfiUnsafe { ty: Ty<'tcx>, reason: String, help: Option<String> },
}
-impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> {
- /// Is type known to be non-null?
- fn ty_is_known_nonnull(&self, ty: Ty<'tcx>) -> bool {
- match ty.kind {
- ty::FnPtr(_) => true,
- ty::Ref(..) => true,
- ty::Adt(def, _)
- if def.is_box() && matches!(self.mode, ImproperCTypesMode::Definitions) =>
- {
- true
- }
- ty::Adt(def, substs) if def.repr.transparent() && !def.is_union() => {
- let guaranteed_nonnull_optimization = self
- .cx
- .tcx
- .get_attrs(def.did)
- .iter()
- .any(|a| a.check_name(sym::rustc_nonnull_optimization_guaranteed));
-
- if guaranteed_nonnull_optimization {
- return true;
- }
+/// Is type known to be non-null?
+fn ty_is_known_nonnull<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>, mode: CItemKind) -> bool {
+ let tcx = cx.tcx;
+ match ty.kind {
+ ty::FnPtr(_) => true,
+ ty::Ref(..) => true,
+ ty::Adt(def, _) if def.is_box() && matches!(mode, CItemKind::Definition) => true,
+ ty::Adt(def, substs) if def.repr.transparent() && !def.is_union() => {
+ let guaranteed_nonnull_optimization = tcx
+ .get_attrs(def.did)
+ .iter()
+ .any(|a| a.check_name(sym::rustc_nonnull_optimization_guaranteed));
- for variant in &def.variants {
- if let Some(field) = variant.transparent_newtype_field(self.cx.tcx) {
- if self.ty_is_known_nonnull(field.ty(self.cx.tcx, substs)) {
- return true;
- }
+ if guaranteed_nonnull_optimization {
+ return true;
+ }
+ for variant in &def.variants {
+ if let Some(field) = variant.transparent_newtype_field(tcx) {
+ if ty_is_known_nonnull(cx, field.ty(tcx, substs), mode) {
+ return true;
}
}
-
- false
}
- _ => false,
+
+ false
}
+ _ => false,
}
+}
+/// Given a potentially non-null type `ty`, return its default, nullable type.
+fn get_nullable_type<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Ty<'tcx> {
+ match ty.kind {
+ ty::Adt(field_def, field_substs) => {
+ let field_variants = &field_def.variants;
+ // We hit this case for #[repr(transparent)] structs with a single
+ // field.
+ debug_assert!(
+ field_variants.len() == 1 && field_variants[VariantIdx::new(0)].fields.len() == 1,
+ "inner ty not a newtype struct"
+ );
+ debug_assert!(field_def.repr.transparent(), "inner ty not transparent");
+ // As it's easy to get this wrong, it's worth noting that
+ // `inner_field_ty` is not the same as `field_ty`: Given Option<S>,
+ // where S is a transparent newtype of some type T, `field_ty`
+ // gives us S, while `inner_field_ty` is T.
+ let inner_field_ty =
+ field_def.variants[VariantIdx::new(0)].fields[0].ty(tcx, field_substs);
+ get_nullable_type(tcx, inner_field_ty)
+ }
+ ty::Int(ty) => tcx.mk_mach_int(ty),
+ ty::Uint(ty) => tcx.mk_mach_uint(ty),
+ ty::RawPtr(ty_mut) => tcx.mk_ptr(ty_mut),
+ // As these types are always non-null, the nullable equivalent of
+ // Option<T> of these types are their raw pointer counterparts.
+ ty::Ref(_region, ty, mutbl) => tcx.mk_ptr(ty::TypeAndMut { ty, mutbl }),
+ ty::FnPtr(..) => {
+ // There is no nullable equivalent for Rust's function pointers -- you
+ // must use an Option<fn(..) -> _> to represent it.
+ ty
+ }
- /// Check if this enum can be safely exported based on the "nullable pointer optimization". If
- /// it can, return the known non-null field type, otherwise return `None`. Currently restricted
- /// to function pointers, boxes, references, `core::num::NonZero*`, `core::ptr::NonNull`, and
- /// `#[repr(transparent)]` newtypes.
- crate fn is_repr_nullable_ptr(
- &self,
- ty: Ty<'tcx>,
- ty_def: &'tcx ty::AdtDef,
- substs: SubstsRef<'tcx>,
- ) -> Option<Ty<'tcx>> {
+ // We should only ever reach this case if ty_is_known_nonnull is extended
+ // to other types.
+ ref unhandled => {
+ unreachable!("Unhandled scalar kind: {:?} while checking {:?}", unhandled, ty)
+ }
+ }
+}
+
+/// Check if this enum can be safely exported based on the "nullable pointer optimization". If it
+/// can, return the the type that `ty` can be safely converted to, otherwise return `None`.
+/// Currently restricted to function pointers, boxes, references, `core::num::NonZero*`,
+/// `core::ptr::NonNull`, and `#[repr(transparent)]` newtypes.
+/// FIXME: This duplicates code in codegen.
+crate fn repr_nullable_ptr<'tcx>(
+ cx: &LateContext<'tcx>,
+ ty: Ty<'tcx>,
+ ckind: CItemKind,
+) -> Option<Ty<'tcx>> {
+ debug!("is_repr_nullable_ptr(cx, ty = {:?})", ty);
+ if let ty::Adt(ty_def, substs) = ty.kind {
if ty_def.variants.len() != 2 {
return None;
}
return None;
}
- let field_ty = fields[0].ty(self.cx.tcx, substs);
- if !self.ty_is_known_nonnull(field_ty) {
+ let field_ty = fields[0].ty(cx.tcx, substs);
+ if !ty_is_known_nonnull(cx, field_ty, ckind) {
return None;
}
- // At this point, the field's type is known to be nonnull and the parent enum is
- // Option-like. If the computed size for the field and the enum are different, the non-null
- // optimization isn't being applied (and we've got a problem somewhere).
- let compute_size_skeleton =
- |t| SizeSkeleton::compute(t, self.cx.tcx, self.cx.param_env).unwrap();
+ // At this point, the field's type is known to be nonnull and the parent enum is Option-like.
+ // If the computed size for the field and the enum are different, the nonnull optimization isn't
+ // being applied (and we've got a problem somewhere).
+ let compute_size_skeleton = |t| SizeSkeleton::compute(t, cx.tcx, cx.param_env).unwrap();
if !compute_size_skeleton(ty).same_size(compute_size_skeleton(field_ty)) {
bug!("improper_ctypes: Option nonnull optimization not applied?");
}
- Some(field_ty)
+ // Return the nullable type this Option-like enum can be safely represented with.
+ let field_ty_abi = &cx.layout_of(field_ty).unwrap().abi;
+ if let Abi::Scalar(field_ty_scalar) = field_ty_abi {
+ match (field_ty_scalar.valid_range.start(), field_ty_scalar.valid_range.end()) {
+ (0, _) => bug!("Non-null optimisation extended to a non-zero value."),
+ (1, _) => {
+ return Some(get_nullable_type(cx.tcx, field_ty));
+ }
+ (start, end) => unreachable!("Unhandled start and end range: ({}, {})", start, end),
+ };
+ }
}
+ None
+}
+impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> {
/// Check if the type is array and emit an unsafe type lint.
fn check_for_array_ty(&mut self, sp: Span, ty: Ty<'tcx>) -> bool {
if let ty::Array(..) = ty.kind {
fn check_type_for_ffi(&self, cache: &mut FxHashSet<Ty<'tcx>>, ty: Ty<'tcx>) -> FfiResult<'tcx> {
use FfiResult::*;
- let cx = self.cx.tcx;
+ let tcx = self.cx.tcx;
// Protect against infinite recursion, for example
// `struct S(*mut S);`.
}
match ty.kind {
- ty::Adt(def, _)
- if def.is_box() && matches!(self.mode, ImproperCTypesMode::Definitions) =>
- {
+ ty::Adt(def, _) if def.is_box() && matches!(self.mode, CItemKind::Definition) => {
FfiSafe
}
// discriminant.
if !def.repr.c() && !def.repr.transparent() && def.repr.int.is_none() {
// Special-case types like `Option<extern fn()>`.
- if self.is_repr_nullable_ptr(ty, def, substs).is_none() {
+ if repr_nullable_ptr(self.cx, ty, self.mode).is_none() {
return FfiUnsafe {
ty,
reason: "enum has no representation hint".into(),
ty::RawPtr(ty::TypeAndMut { ty, .. }) | ty::Ref(_, ty, _)
if {
- matches!(self.mode, ImproperCTypesMode::Definitions)
+ matches!(self.mode, CItemKind::Definition)
&& ty.is_sized(self.cx.tcx.at(DUMMY_SP), self.cx.param_env)
} =>
{
};
}
- let sig = cx.erase_late_bound_regions(&sig);
+ let sig = tcx.erase_late_bound_regions(&sig);
if !sig.output().is_unit() {
let r = self.check_type_for_ffi(cache, sig.output());
match r {
// `extern "C" fn` functions can have type parameters, which may or may not be FFI-safe,
// so they are currently ignored for the purposes of this lint.
- ty::Param(..) | ty::Projection(..)
- if matches!(self.mode, ImproperCTypesMode::Definitions) =>
- {
+ ty::Param(..) | ty::Projection(..) if matches!(self.mode, CItemKind::Definition) => {
FfiSafe
}
help: Option<&str>,
) {
let lint = match self.mode {
- ImproperCTypesMode::Declarations => IMPROPER_CTYPES,
- ImproperCTypesMode::Definitions => IMPROPER_CTYPES_DEFINITIONS,
+ CItemKind::Declaration => IMPROPER_CTYPES,
+ CItemKind::Definition => IMPROPER_CTYPES_DEFINITIONS,
};
self.cx.struct_span_lint(lint, sp, |lint| {
let item_description = match self.mode {
- ImproperCTypesMode::Declarations => "block",
- ImproperCTypesMode::Definitions => "fn",
+ CItemKind::Declaration => "block",
+ CItemKind::Definition => "fn",
};
let mut diag = lint.build(&format!(
"`extern` {} uses type `{}`, which is not FFI-safe",
self.check_type_for_ffi_and_report_errors(span, ty, true, false);
}
- fn is_internal_abi(&self, abi: Abi) -> bool {
- if let Abi::Rust | Abi::RustCall | Abi::RustIntrinsic | Abi::PlatformIntrinsic = abi {
+ fn is_internal_abi(&self, abi: SpecAbi) -> bool {
+ if let SpecAbi::Rust
+ | SpecAbi::RustCall
+ | SpecAbi::RustIntrinsic
+ | SpecAbi::PlatformIntrinsic = abi
+ {
true
} else {
false
impl<'tcx> LateLintPass<'tcx> for ImproperCTypesDeclarations {
fn check_foreign_item(&mut self, cx: &LateContext<'_>, it: &hir::ForeignItem<'_>) {
- let mut vis = ImproperCTypesVisitor { cx, mode: ImproperCTypesMode::Declarations };
+ let mut vis = ImproperCTypesVisitor { cx, mode: CItemKind::Declaration };
let abi = cx.tcx.hir().get_foreign_abi(it.hir_id);
if !vis.is_internal_abi(abi) {
_ => return,
};
- let mut vis = ImproperCTypesVisitor { cx, mode: ImproperCTypesMode::Definitions };
+ let mut vis = ImproperCTypesVisitor { cx, mode: CItemKind::Definition };
if !vis.is_internal_abi(abi) {
vis.check_foreign_fn(hir_id, decl);
}
Error(DelaySpanBugEmitted),
}
+impl TyKind<'tcx> {
+ #[inline]
+ pub fn is_primitive(&self) -> bool {
+ match self {
+ Bool | Char | Int(_) | Uint(_) | Float(_) => true,
+ _ => false,
+ }
+ }
+}
+
/// A type that is not publicly constructable. This prevents people from making `TyKind::Error`
/// except through `tcx.err*()`.
#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
#[inline]
pub fn is_primitive(&self) -> bool {
- match self.kind {
- Bool | Char | Int(_) | Uint(_) | Float(_) => true,
- _ => false,
- }
+ self.kind.is_primitive()
}
#[inline]
use super::T;
extern "C" {
fn transparent() -> T;
+ fn transparent_incorrect() -> T;
}
}
// Shouldn't warn here, because repr(transparent) guarantees that T's layout is the
// same as just the usize.
fn transparent() -> usize;
+
+ // Should warn, because there's a signedness conversion here:
+ fn transparent_incorrect() -> isize;
+ //~^ WARN `transparent_incorrect` redeclared with a different signature
}
}
}
= note: expected `unsafe extern "C" fn(sameish_members::a::Point)`
found `unsafe extern "C" fn(sameish_members::b::Point)`
+warning: `transparent_incorrect` redeclared with a different signature
+ --> $DIR/clashing-extern-fn.rs:195:13
+ |
+LL | fn transparent_incorrect() -> T;
+ | -------------------------------- `transparent_incorrect` previously declared here
+...
+LL | fn transparent_incorrect() -> isize;
+ | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this signature doesn't match the previous declaration
+ |
+ = note: expected `unsafe extern "C" fn() -> transparent::T`
+ found `unsafe extern "C" fn() -> isize`
+
warning: `missing_return_type` redeclared with a different signature
- --> $DIR/clashing-extern-fn.rs:208:13
+ --> $DIR/clashing-extern-fn.rs:213:13
|
LL | fn missing_return_type() -> usize;
| ---------------------------------- `missing_return_type` previously declared here
found `unsafe extern "C" fn()`
warning: `non_zero_usize` redeclared with a different signature
- --> $DIR/clashing-extern-fn.rs:226:13
+ --> $DIR/clashing-extern-fn.rs:231:13
|
LL | fn non_zero_usize() -> core::num::NonZeroUsize;
| ----------------------------------------------- `non_zero_usize` previously declared here
found `unsafe extern "C" fn() -> usize`
warning: `non_null_ptr` redeclared with a different signature
- --> $DIR/clashing-extern-fn.rs:228:13
+ --> $DIR/clashing-extern-fn.rs:233:13
|
LL | fn non_null_ptr() -> core::ptr::NonNull<usize>;
| ----------------------------------------------- `non_null_ptr` previously declared here
found `unsafe extern "C" fn() -> *const usize`
warning: `option_non_zero_usize_incorrect` redeclared with a different signature
- --> $DIR/clashing-extern-fn.rs:254:13
+ --> $DIR/clashing-extern-fn.rs:259:13
|
LL | fn option_non_zero_usize_incorrect() -> usize;
| ---------------------------------------------- `option_non_zero_usize_incorrect` previously declared here
found `unsafe extern "C" fn() -> isize`
warning: `option_non_null_ptr_incorrect` redeclared with a different signature
- --> $DIR/clashing-extern-fn.rs:256:13
+ --> $DIR/clashing-extern-fn.rs:261:13
|
LL | fn option_non_null_ptr_incorrect() -> *const usize;
| --------------------------------------------------- `option_non_null_ptr_incorrect` previously declared here
= note: expected `unsafe extern "C" fn() -> *const usize`
found `unsafe extern "C" fn() -> *const isize`
-warning: 13 warnings emitted
+warning: 14 warnings emitted
projects / rust.git / commitdiff